MACKOCHLAMYS. 



10-; 



at the periphery, convex beneath ; aperture subvertical, broadly 

 and ovatelv lunate, margins converging; peristome thin, the basal 

 margin slightly arcuate, columellar margin vertical for a short 

 distance above, and reflected, then curved and oblique, slightly 

 expanded. 



Major diam. 1'2.\, min. 11.4, height mm. 



Hah. Erahmakmid, p]astern Assam ; Siugpho (J/. 0(jle) ; Naga 

 and X. Cachar Hills (^Godwin- A^(Sten). 



a'. SJiell (jlohose. 



b'. Stronghj or microscopically striate lonrfitiidinallij. 



[157. Macrochlamys beata, Godivin-Austen, Mol. Lid. ii, 1899, p. 156, 

 pi. 106, tigs. 1-1 b. 



fcjhell depressedly globose, rather thin, imperforate; sculpture 

 Avavy, strong, regular longitudinal striation, crossed by distant 

 lines of growth ; colour olivaceous brown ; spire low, apex rounded ; 

 suture shallow; whorls 5, gradually expanding; aperture ovate, 

 oblique ; peristome thin ; columellar margin oblique, with a very 

 slight reflection. 



Size : maj. diam. 12*0, alt. axis 4-5 mn). 



Locality. "Shengorh Peak, Dafla Hills, 6000 ft. (Godwin-Austen). 



Among specimens of this shell, I noticed one which contained a 

 dried-up animal in good preservation. It was put to soak, and 

 after 15 days was examined, when the external characters were 

 remarkably well seen, even to the peripodial grooves and streaks 

 on side of the foot. It has a narrow tongue-like right shell-lobe 

 and a similar well-developed left shell-lobe. After further soaking 

 in water for 24 days, the amatorial organ was well seen and the 

 jaw secured ; the radula was broken up, but after a long search 

 over three glass slides which had been hi use I found and mounted 

 a portion of it. The central teeth have a cusp on the outer side 

 and a small one on the inner apical margin. The admedian are 

 all short and straight-sided, not bicuspid, an unusual character. 



The shell-lobes are like those of Macrochlamys, and I jdace it in 

 that genus.] 



[15S. Macrochlamys munipiirensis, Godwin- Austen. Mol. Ind. ii, 

 1899, p. 15S. 



Shell very globose and conoid, thin, scarcely and finely perforate: 

 sculpture smooth and glassy to the eye, yet under high power and 

 in good light extremely fine fairly regular striation is visible ; 

 colour pale straw with a green tinge ; spire high, conic ; suture 

 impressed ; whorls 4|, the last expanding rapidly, well rounded on 

 the periphery ; aperture roundly lunate, subvertical ; peristome 

 thin ; columella very weak, scarcely any reflection, margin sub- 

 oblique. 



Size : maj. diam. 11*5, alt. axis 6-5 mm. 



Locality. "N.E. Munipur Hills {Godivia- Austen). Two specimens 

 in lirit. Mus. Nat. History collection.] 



